TY - JOUR
T1 - Development of stiff shoulder in asymptomatic volunteers during ten-year follow-up in Japan
AU - Okada, Eijiro
AU - Matsumoto, Morio
AU - Ichihara, Daisuke
AU - Chiba, Kazuhiro
AU - Toyama, Yoshiaki
AU - Fujiwara, Hirokazu
AU - Momoshima, Suketaka
AU - Nishiwaki, Yuji
AU - Hashimoto, Takeshi
AU - Watanabe, Masahiko
AU - Inoue, Tomoo
AU - Takahata, Takeshi
PY - 2010
Y1 - 2010
N2 - Objectives: The purpose of this study was to longitudinally evaluate relationships between the incidence of stiff shoulder and sagittal alignments of the cervical spine, age-related changes on magnetic resonance imaging (MRI) and life styles of the subjects. Methods: The subjects were 69 men and 93 women. The mean follow-up period was 11.3 ± 0.7 years. Sagittal alignments of the cervical spine were classified into the following 4 types: lordosis, straight, kyphosis and sigmoid. MRI findings were evaluated for the progression of 1) decrease in signal intensity of disc, 2) posterior disc protrusion, and 3) disc space narrowing. Results: Stiff shoulder was found in 29.6% of the subjects over the 10 years. In the group of subjects 30-49 years old, the incidence of stiff shoulder was 40.4%, and it was higher than those in other age groups. Stiff shoulder was significantly more frequent in women (45.2%) than in men. Its incidence was significantly lower in those who regularly participated in sports or exercise. There were no significant relationship between the incidence of stiff shoulder and the progressions in any of MRI findings during the follow-up period. Conclusions: Stiff shoulder was more frequent in middle-aged, female and non-exercising subjects. There was no correlation between the incidence of stiff shoulder and sagittal alignments of the cervical spine, or progression of age-related changes of the cervical disc on MRI.
AB - Objectives: The purpose of this study was to longitudinally evaluate relationships between the incidence of stiff shoulder and sagittal alignments of the cervical spine, age-related changes on magnetic resonance imaging (MRI) and life styles of the subjects. Methods: The subjects were 69 men and 93 women. The mean follow-up period was 11.3 ± 0.7 years. Sagittal alignments of the cervical spine were classified into the following 4 types: lordosis, straight, kyphosis and sigmoid. MRI findings were evaluated for the progression of 1) decrease in signal intensity of disc, 2) posterior disc protrusion, and 3) disc space narrowing. Results: Stiff shoulder was found in 29.6% of the subjects over the 10 years. In the group of subjects 30-49 years old, the incidence of stiff shoulder was 40.4%, and it was higher than those in other age groups. Stiff shoulder was significantly more frequent in women (45.2%) than in men. Its incidence was significantly lower in those who regularly participated in sports or exercise. There were no significant relationship between the incidence of stiff shoulder and the progressions in any of MRI findings during the follow-up period. Conclusions: Stiff shoulder was more frequent in middle-aged, female and non-exercising subjects. There was no correlation between the incidence of stiff shoulder and sagittal alignments of the cervical spine, or progression of age-related changes of the cervical disc on MRI.
KW - MRI
KW - Stiff shoulder
KW - asymptomatic volunteers
KW - disc degeneration
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U2 - 10.3233/BMR-2010-0253
DO - 10.3233/BMR-2010-0253
M3 - Article
C2 - 20555119
AN - SCOPUS:77954102484
VL - 23
SP - 69
EP - 75
JO - Journal of Back and Musculoskeletal Rehabilitation
JF - Journal of Back and Musculoskeletal Rehabilitation
SN - 1053-8127
IS - 2
ER -